lib/libc/rpc/rpc_callmsg.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro
  30  * @(#)rpc_callmsg.c    2.1 88/07/29 4.0 RPCSRC
  31  * $FreeBSD: src/lib/libc/rpc/rpc_callmsg.c,v 1.9 1999/08/28 00:00:45 peter Exp $
  32  * $DragonFly: src/lib/libc/rpc/rpc_callmsg.c,v 1.4 2005/11/13 12:27:04 swildner Exp $
  33  */
  34
  35 /*
  36  * rpc_callmsg.c
  37  *
  38  * Copyright (C) 1984, Sun Microsystems, Inc.
  39  *
  40  */
  41
  42 #include <sys/param.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <rpc/rpc.h>
  46
  47 /*
  48  * XDR a call message
  49  */
  50 bool_t
  51 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  52 {
  53         int32_t *buf;
  54         struct opaque_auth *oa;
  55
  56         if (xdrs->x_op == XDR_ENCODE) {
  57                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) {
  58                         return (FALSE);
  59                 }
  60                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) {
  61                         return (FALSE);
  62                 }
  63                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT
  64                         + RNDUP(cmsg->rm_call.cb_cred.oa_length)
  65                         + 2 * BYTES_PER_XDR_UNIT
  66                         + RNDUP(cmsg->rm_call.cb_verf.oa_length));
  67                 if (buf != NULL) {
  68                         IXDR_PUT_LONG(buf, cmsg->rm_xid);
  69                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  70                         if (cmsg->rm_direction != CALL) {
  71                                 return (FALSE);
  72                         }
  73                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_rpcvers);
  74                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
  75                                 return (FALSE);
  76                         }
  77                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_prog);
  78                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_vers);
  79                         IXDR_PUT_LONG(buf, cmsg->rm_call.cb_proc);
  80                         oa = &cmsg->rm_call.cb_cred;
  81                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  82                         IXDR_PUT_LONG(buf, oa->oa_length);
  83                         if (oa->oa_length) {
  84                                 memcpy((caddr_t)buf, oa->oa_base, oa->oa_length);
  85                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  86                         }
  87                         oa = &cmsg->rm_call.cb_verf;
  88                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  89                         IXDR_PUT_LONG(buf, oa->oa_length);
  90                         if (oa->oa_length) {
  91                                 memcpy((caddr_t)buf, oa->oa_base, oa->oa_length);
  92                                 /* no real need....
  93                                 buf += RNDUP(oa->oa_length) / sizeof (int32_t);
  94                                 */
  95                         }
  96                         return (TRUE);
  97                 }
  98         }
  99         if (xdrs->x_op == XDR_DECODE) {
 100                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 101                 if (buf != NULL) {
 102                         cmsg->rm_xid = IXDR_GET_LONG(buf);
 103                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 104                         if (cmsg->rm_direction != CALL) {
 105                                 return (FALSE);
 106                         }
 107                         cmsg->rm_call.cb_rpcvers = IXDR_GET_LONG(buf);
 108                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) {
 109                                 return (FALSE);
 110                         }
 111                         cmsg->rm_call.cb_prog = IXDR_GET_LONG(buf);
 112                         cmsg->rm_call.cb_vers = IXDR_GET_LONG(buf);
 113                         cmsg->rm_call.cb_proc = IXDR_GET_LONG(buf);
 114                         oa = &cmsg->rm_call.cb_cred;
 115                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 116                         oa->oa_length = IXDR_GET_LONG(buf);
 117                         if (oa->oa_length) {
 118                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 119                                         return (FALSE);
 120                                 }
 121                                 if (oa->oa_base == NULL) {
 122                                         oa->oa_base = (caddr_t)
 123                                                 mem_alloc(oa->oa_length);
 124                                 }
 125                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 126                                 if (buf == NULL) {
 127                                         if (xdr_opaque(xdrs, oa->oa_base,
 128                                             oa->oa_length) == FALSE) {
 129                                                 return (FALSE);
 130                                         }
 131                                 } else {
 132                                         memcpy(oa->oa_base, (caddr_t)buf,
 133                                             oa->oa_length);
 134                                         /* no real need....
 135                                         buf += RNDUP(oa->oa_length) /
 136                                                 sizeof (int32_t);
 137                                         */
 138                                 }
 139                         }
 140                         oa = &cmsg->rm_call.cb_verf;
 141                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 142                         if (buf == NULL) {
 143                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 144                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE) {
 145                                         return (FALSE);
 146                                 }
 147                         } else {
 148                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 149                                 oa->oa_length = IXDR_GET_LONG(buf);
 150                         }
 151                         if (oa->oa_length) {
 152                                 if (oa->oa_length > MAX_AUTH_BYTES) {
 153                                         return (FALSE);
 154                                 }
 155                                 if (oa->oa_base == NULL) {
 156                                         oa->oa_base = (caddr_t)
 157                                                 mem_alloc(oa->oa_length);
 158                                 }
 159                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 160                                 if (buf == NULL) {
 161                                         if (xdr_opaque(xdrs, oa->oa_base,
 162                                             oa->oa_length) == FALSE) {
 163                                                 return (FALSE);
 164                                         }
 165                                 } else {
 166                                         memcpy(oa->oa_base, (caddr_t)buf,
 167                                             oa->oa_length);
 168                                         /* no real need...
 169                                         buf += RNDUP(oa->oa_length) /
 170                                                 sizeof (int32_t);
 171                                         */
 172                                 }
 173                         }
 174                         return (TRUE);
 175                 }
 176         }
 177         if (
 178             xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) &&
 179             xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
 180             (cmsg->rm_direction == CALL) &&
 181             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 182             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 183             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) &&
 184             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers)) &&
 185             xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_proc)) &&
 186             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) )
 187             return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 188         return (FALSE);
 189 }
 190